Furnace.



F. 0. MOLL.

FURNACE.

' APPLICATION FILED MAR. 14, 19131 1,132,373. Patented Mar.16,1915.

3 SHEETS-SHEET 1 WITNESsES I IV [/5 N T0 ATTORNEYS F. 0. MOLL.

FURNACE.

APPLICATION FILED MAR. H, 1913 Patented Mar. 16, 1915.

1,1 3 snnms sanm 2 W/T/VESSES' /NVENTOR Fran/c 0. Mo//.

$627427 W m ATTORNEYS F. 0. MOLL.

FURNACE.

APPLIOATION FILED LLAR.14, 1913,

Patented Mar. 16, 1915.

3 $HEETSSHEBT 3.

2 mm 4\\ 1 & S J iwmw EM q W i w 1 I i H i M M f F J m 2 i 1 fl a fl f im h; 1; g on N. on S INVENTUR Frank 0 Mol/ ATTORNEYS WITNESSES FRANKOTTO MOLL, OF PORTLAND, OREGGN.

"FURNACE,

Specification of Letters Patent.

Patented Mar. 16, 1915.

Application filfid March 14, 1913. Serial No. 754,210.

To all whom it may tom-cm llo it known that I. FRANK. (l. M01111, acitizen of the United F t-ates, and a rcsirlout at Portland, in thecounty of Mnllnomuh :nul State of Oregon, have inventor! a new ul'itllnipmrod l urnncv. if whivh the fol loving is a full, (*lflll, and oxnctilescrip tin-n.

My invention relates to furnaces of the warm-air" type. and the objectthvrvof is to prmiuuc a hunter of this nature \a'hiih will lie \erjollioient and economical in any tiou. ensilv cliinllutl, proofilgfzi'imt hank-age tl'irougfh in; Walls of (he LIN-H951 gj 'lltlzltll.uiul s (roustruotP l that the part:

vr-rl l inrilur of my furnuce pit-lm'ulily :xl' thin :nrta uu-in row sonof such construction tlu iluv till/S haw a shortor lilo than a huurivrmetal constr-u-otinin l support the same in plan) by ion-ans,facilitating their rumovul :nnl ltr nonnl as often as required.

A further ohjm-t of my invention in to prolimo a furnace or heater (itthe type lilttiltlflflflli which will readily I'm (to heat. (Gr l 1? mVi:jizll$1ti '3l little fun! in opera til 11 213ml h i'izipulwlt oiusing: a lower irznlo ol' l'uvl thy, ii mlly roi'piiroil for siinilsirliar-nu no on tlunuirlcot.

l w it hail to tluinwmupnnylug ihnwiizgri'nuiiu" u part of this spentiimiliwix in whirl: 1hr HUXA ohurnrturr; oi rotvri-nw lul :wln fr"Fllllll? park in ill tho Vim.

llfijili't l i :1 \wticnl l ngitudinal am:-

iii-M on tho lino 3 of Fig. i; Fig". lis a horizontal sopflioius] \iuv;on tho lino l i oi l i 1: Fig. 5 is :1 horizontal wt't-ltiwtlttl aiz-won the lino 5 5 of Fig. '1; Hg. 0 is n :mriionul iimv on tho line (3' Uof Fig: l. and Fig. 7 @411 d all howinp' how the mills of 1hrlwutins pipare l ttfllittl to the plate liwn in hip.

l iopro ll lit-M01 compriws an oute ('H lug tho $1. -7 whivl: ur ho\\'u:il l {up if zuul ro-ling: upon 21 him.

ing tuho iii-ranged in two horizontal layers. null in opvidtioli tho hotgases of cornlmmtion float pass; through the upper layer Hiltl thourlzrn'n through the lowor layer 1wl ro the) roach thiglluc and pass out.The nir to F honlvrl pauses into tho (using through an opening I whi l)is; shown as lJQ'" lug; l lltll kl it the mug and tho min-so taken bythis air is arch that it comes into contact hoth with tho lirwiio 11mlthe hunting tulma (f= holoro it can post; out through the fluw whirl)lrwul fr m the top of the outer musing: of tho tumors t tho apartmentsto ho huntci'l.

Tho fin; m); if course mulls of metal and it ii linwl with llrilruzl orany other suitniilu rllv -tor u'uitrrizll shims; at 59. 'lhrougz h its'ront it hm; no open whiuh is; ((HillWfil'tl in oi an annular we l to anr liiillfi thr 'iugh tho {rout of tlu: outir cu, luxl'urnncw than, isnormally cloexci'l 1L :in-rl thi front of tho will l is lioltiwl both totho and to the lire-l ox 4, understood, suitable this purpono. /r-lo tholining 9 lli21ll\\ tho top of the A? :nhpit min ho had i T, which iscloned h iloor ll liolow tho !l(ml' ll. l l'jv uminant :1 v i-l1 th ttho lirenli h huh" il F5 Wm ill opouiir uiu urslooil. 'lm'metl liyll'ilflll? of :in iuvliiml pr'to .15, and nni r haw :iu oprning the lmsu0 ll) tlierotlirougli directly liv ow the ilhllpli, as shown in Fi l.

The fire-box 4 has an outlet opening through the back nomthe top, andaround this outlvt o 'ioning is secured :1 cast iron col lur II. Thiscollar abuts against the outer 1 ml of unolhor cast iron collar 18Secured :u-ouiul an inlet opening to :1 radiator 19 which is locatedndjucont the hack of the analog 1 and supported upon standards 20. Thisradiator 19 prefmzibly made of steel plutw. and tho gruscs -ofcombustion pass through tho radiator on their Way to the heating tubes6.

At the top 01 the casing 19 are suitable openings shown as three. innumber located in the front wall and are surroruuled by uumns of (miiron collarsv ll luwing flanges:

which are bolted to the front of the radiator, these collars receivingthe rear ends of the heating tubes (3. These collars are preferahlytapering in form and receive the ends of the tubes 6 which tit tightlyaround the same. The upper layer of heating tubes therefore is composedof three tubes and the front ends thereof are supported by means of aplate 22 which has a flange forming a foot 24 resting upon the top ofthe lire-box 4 and having its upper edge secured to a transverse flange23 on the lower side of the top 2. A transverse horizontal plate may beemployed to extend from one side of the casing to the other in the frontof the plate 22 at the bottom thereof, resting upon the foot 24 and upona corresponding rib 26 formed on the inner face of the front of thecasing, and this plate. together with the plate 22, will form a closedchamber into which access cannot be had from the lower part of thecasing 1.. In consequence the hot gases passing into the radiator 19 andthrough the upper layer of tubes 6 cannot pass out through the bottom ofthe chamber formed by the plates 22 and 25 and portions of the top andfront of the casing, nor can any air entering the casing through theopening 7 pass into the chamber from below.

be lower layer of heating tubes 6 is shown as consisting of two tubes.and these tubes are likewise supported at their inner ends by having thesaid inner ends -iippcd over collars 21 secured to the front wall ol theradiator below the firstanention d col lars 21. The lower tubes arestaggered with respect to the upper tubes and their front ends aresupported by the plate in the same manner. this plate having aperturesthrough which the front ends project a slight distance.

The wall forn'iing the web or is connected to the front wall of theradiator 19 by means of rods 27. and in order to make a perfectly tightfit between the front ends of the tubes 6 and the apertures in the plate22 receiving them, I employ conical rings 28. The tubes 6 may be ofsteel. or sheet iron and the collars 28 of malleable iron heavy enoughto retain their shapes and be capable of being ground to a true circleso that they will fit the tubes. On account of their conical shape theypress the material forming the front ends of the tubes 6 into tightcontact with the edge of the openings in the plate 22 and form aperfectly leak-proof joint. A swinging door may be formed in the frontof the casing near the top, this door being shown at 29. to give accessto the front of the tubes 6 or to the chamber into Which the front endsof these tubes open. when necessary.

The radiator casing 19 is provided with a transverse flue 30 which iswide enough to communicate with the e of both of the partition 22 lowertubes 0, and this tube lit; ti against the front wall of the radiatorand is ipported at its rear end by tut; of a suitable rib 31 it'orn'icdon the ir race of the rear wall of the radiator. ic flue 230communicates centrally with an. outlet opening surrounding which is acast iron collar 33 similar to the collars 21 bolted to the outside ofthe rear wall 01' the radiator 19 and extending through an opening inthe rear wall of the outer casing. Over the outer end of this collar isslipped a conduit which forms a branch of the line 5, so that the gasesafter passing through the upper and lower tubescan then pass out throughthe smoke fine.

The radiator 19, as will appear from an inspection of Figs. 3, 4 and isshaped in cross-section like the segment of a circle. and the flue 30does not obstruct the pas sage of gases upward through the radiatorbecause there are spaces on either Sitlc of this fine through which thegases oi" coin? us; tion can pass on their way to the upper tn 6. Afterpassing through these upper in the reach the chamber formed in the upperpart of the front of the casing and tin-n downward to pass through thelower tubes and the flue 30 and then out oi thc furnace to the chimney.

.\t tlic l wer part of thc ru-nliatw' ir line with the collars 1? andlei o1 cning which is a.--sociatcd boltcil to the .cui'

ll) Ill'ul is an with a collar 35 wall or the radiatn and passingthrough an open ng at the rcar oi the casing l a ovc the opening 7. inthis collar is mounted a suitable damper 3 1. and the lower end of thesmoke tine 35 will be pro\ ided with a transvcrse extension which isslipped mm the outcr end of the collar. and when the damper so is opensome of the gases can be allowed to escape directly through the line 5in tead of passing upward through the tube- 3.

The inside of the casing l carries deflector plates 37 which :H'csecured at the sides and normally extend upward at a slight inclination,approximately to the sides of the outer tubes 6 in the upper layer.Thcir function is to prevent air passing in through the opening 7 frompas-ing out through the tubes 8 without first coining into contact withthe heating tubes 6. and I can regulate this heating etl'cct by changingthe position of the plates, so that a reatcr or less quantity of air canbe cause to pass through the casing without coming into direct contactwith the heating tubes.

As shown in Figs. 5%, l and ii. the horizon tal cross-sectional shape ofthe furnace is approximately circular. The \\':ill. of the casing 1 aremade ot' plarcs ot' suitable. thickness and the casing may be prov idcdwith an extended fr nt whi h is losed by i that my furnace this platemay be received in a groove 38 in the base 3, the base being extended infront to correspond with the oxtcn 'on of the easing, and the platesforming ill bottom of the casing around the id s and back will be heldin place by an annular rib ll on the base 3, which will pass a ound thebottom edges of the sides and bani; oi the casing and engage the samehen malleable iron ronical rings 1 2* are driven into the ends of thosetubes. the seams of the latter permit snlii l. t otouiuion to cause theouter Siltltf? ol' the tube to have a gas-tightwoutart n ith the edgesof the open ings in the plate The operation any furnace will now beclear. When there is a fire, air passing in through the opening '4'first comes into contact with the Walls of the fire-boa, collars l7 andid and the tubes passing out through the fine 30 after being heated. Thehot gases of combustion pass through the collars 17 and 18 in theradiator ll) up past the llue 30 into the upper tubes ti. then towardilie front of the furnace, then downward through the lower tubes 6 andout through the due 30 and the collar 33 into the flue. 5. The damper 36gives a direct dra ft through the chimhey when open and useful when thelire is .to be started or replenished, as will be rea ilv understood;

From the above description it will be seen is so constructed that it anbe readily cleaned andilrept clean at all times, and in case of theparts becoming worn and having to be replaced the replace. ment can beeasily effected. count of the h rge extent of radiating sur face intocontact Eiv'th which the air passes on its nay thr h the inn-inn i. l donot reouire as but a A r to get a good heating; of fect.-. can also usea cheaper grade of coal or other; fuel. such as vwid.

fin account of the manner in which my furnace is construct d thilcalianeof gases from the fiife box into the collar or other apartment in Whichtin: same is operated is impossible. l 'hc doors are all in'rangrcd soas t fit tightly the openings which they control. and the radiator l9,the firebox 4 and all o l' the fines through which the gases pass ontheir 'tvay through the furnace and out of the same are made withleak-proof joint-sv It will be seen from the tubes 6 are arrangcd thatthe hot gases when they reach the top of the fiu'naoe are spread out toa. considerable extent and the air to be heated thus "passes not onlyaround the tubes but among: them. it is this construction which gives athorough and efiicient effect.

I wish to have it under mil that the above description is illustrativeonly and discloses but one embodiment of my invention. and I do not careto be limited to the exact details Further. on acthe manner in Wllifiilishown and described, but reserve to myself the right to make nichcluingcs in the shape, size and arrangcincnt ol the parts as fairly talllllllll the scorn nnd spirit. of my inveim lion.

'lzning thu described my invention, 1 lain: a no. and i hlll. in stair-ey Letters latrnt:

l. in a l ol nil furnace a asing ha\ ing an air inict 11L its: war lowerportion. a tire box in {la lower front. portion of the casing, a ouiator in tin rrar portion of the casing aboi c the air inlet andextending to the top of the vzalffl', said radiator being spaced fromand having a line. connection with the lirc box a chamber at the frontof the casing above the tire lrU.\' apl rality of heating tubes arran cdin tiers in the upper part of the casing. the upper tier of tubes havingtheir ends opening into thc cham er and radiator and the lower ticrhating one end opening into the said chamber, and a fine leading to anoutlet llue and with whirli the other ends of the lower tier of tubesare connected.

2. In a device of the kind described; the combination of a casing, alire-box located in the front end of said casing. a radiator located atthe rear of the casing, means cstablishing colnmunication between thefirebox and the radiator, a plurality of heating tubes communicatingwith the front wall of thc radiator near the top thereof and extendingtoward the front of the casing. 21 ehamber at the front of the casing'and communicating with the front ends of -said tubes. additional tubescommunicating at- !bcir front ends with said chamber, and a docextruding through the radiator and connccting: the rear ends of the lastnamed tubes with an outlet line.

3, [n a dcvice of the kind described, the ronibination of a casing, afire-box located in the front end of said casing, a radiator segmentalin shape and located at the rear of the casing, said radiator extendingfrom a short distance from the bottom of thecasing to the top thereof, aflue connection between the fire-box andthe lower ortion of theradiator, a plurality of heating tubes communicating with the front wallof the radiator near the top thereof and extending toward the front ofthe casing. a chamber at the front of the casing and communicating withthe front ends of said tubes, additional tubes below the first tubes andcomnnminating at their front ends with said chamber, and a fineconnecting the rear ends of thelast named tubes with an outlet flue,said flue passing through the radiator from the front to the rear of thesame.

4. In a furnace, the combination of a casing. a fire box in the lower.front portion of the casing, a radiator ixrthe rear portion of thecasing and communicating at it); lower end With the fire box, an outletflue having a damper controlled connection with the radiator, heatingtubes arranged in tiers in the upper part of the casing, the upper tierbeing connected with the upper end of the radiator, a chamber at thefrontend of the casing and with which the front ends of the tiers oftubes con'imunicate, and a flue extending through the radiator andconnected with the lower tier of tubes and with the outlet flue abovethe connection of the radiator with said flue.

5. In a furnace, a casing having an air inlet at its lower rear portion,a. tire box in the lower front portion of the casing, a segmental-shaped radiator in the rear portion of the casing and extendingto the top there of, a flue connecting the radiator with the tire box,an outlet fine with which the radia tor is connected, a chamber at thefront of the casing above the tire box, a flue extending through theradiator and connected with the outlet line above the connection of theradiator with the outlet flue. and heating tubes arranged in tiers inthe upper part of the casing, the tubes of the upper tier having theirends opening into the radiator and chamber and the tubes of the lowertier eing less in number and having their ends opening into the saidchamber and the flue extending through the radiator.

6. A furnace, comprising a casing having an air inlet in its lower rearportion, a tire box in the lower front portion of the casing, 11segmental radiator in the rear portion of the casing, said radiatorextending a short distance from the bottom of the casing to the topthereof, a flue connecting the fire box with the lower end of theradiator, an outlet flue outside of thecasing, a valved connectionbetween the outlet flue and the lower part of the radiator, a chamber inthe front of the casing above the tire box, a heating tubes arranged inpart of the casing, tier being of greater tier and the tubes of tiers inthe upper the tubes of the upper number than the lower each tier havingone end plurality of r opening into the said chamber and the tubes ofthe upper tier having their other-ends opening into the upper end of theradiator, a flue extending through the radiator and into which the tubesof the lower tier open, and a fine connection between the outlet flueand the flue extending through the radiator.

7. In a hot air furnace having heating tubes, a. casing, a fire box inthe lower front portion of the casing, the casing having a rib on itsinner front face about one level with the top of the tire box, atransverse vertical plate between the top of the fire box and top of thecasing, said plate extending from side to side of the casing andprovided with apertures to receive the ends of the heating tubes andwith a foot resting upon the lire box, and a transverse horizontal plateresting upon the foot of the vertical plate and the rib of the casing,said plate extending from side to side of the easing and forming withthe vertical plate and the front of the casing, a chamber.

8. in a hot air furnace having heating tubes. a casing ha .ing a flangeon the inner face of its top and a rib on the inner face of its frontwall, a the box in the lower front portion of the casing, a radiator inthe rear portion. of said casing, a vertical plate having a foot restingupon the fire box aud engaging the flange of the top of the casing, saidplate being apertured to receive the heating tubes and extending fromside to side of the casing, longitudinal rods secured to the radiatorand the rertical plate, and a horizontal plate resting upon the rib ofthe casing and the foot of the vertical plate and forming with thevertical plate and the front of the casing, a chamber.

In testimony whereof I have signed my name to this specification in thepresence of two subscribing witnesses.

FRANK OTTO MOLL.

Witnesses J. P. Mnnnrnn, E. B. HOLMES.

